Re-land 714393002 after fixing android build.

sky/engine/wtf/RefPtrTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "wtf/RefPtr.h"
 
 #include "wtf/text/StringImpl.h"
 #include <gtest/gtest.h>
 
 namespace {
 
 TEST(RefPtrTest, Basic)
 {
     RefPtr<StringImpl> string;
     EXPECT_TRUE(!string);
     string = StringImpl::create("test");
     EXPECT_TRUE(!!string);
     string.clear();
     EXPECT_TRUE(!string);
 }
 
-#if COMPILER_SUPPORTS(CXX_RVALUE_REFERENCES)
 TEST(RefPtrTest, MoveAssignmentOperator)
 {
     RefPtr<StringImpl> a = StringImpl::create("a");
     RefPtr<StringImpl> b = StringImpl::create("b");
     // FIXME: Instead of explicitly casting to RefPtr<StringImpl>&& here, we should use std::move, but that
     // requires us to have a standard library that supports move semantics.
     b = static_cast<RefPtr<StringImpl>&&>(a);
     EXPECT_TRUE(!!b);
     EXPECT_TRUE(!a);
 }
-#endif
 
 }